| patterns of concurrent hookworm infection and schistosomiasis in schoolchildren in tanzania. | a cross-sectional study of 6897 schoolchildren in 59 out of the 155 primary schools in magu district on the shores of lake victoria, tanzania, was undertaken in 1997 to determine the prevalence of single- and multiple-species helminth infection. schistosoma haematobium, hookworm (primarily necator americanus) and s. mansoni were the most common helminth species infecting schoolchildren in the district. the prevalences of ascaris lumbricoides and trichuris trichiura were negligible (< 1%). anaemi ... | 1999 | 10696404 |